mirror of
https://github.com/wilr/silverstripe-googlesitemaps.git
synced 2024-10-22 11:05:48 +02:00
480 lines
15 KiB
PHP
480 lines
15 KiB
PHP
<?php
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/**
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* Sitemaps are a way to tell Google about pages on your site that they might
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* not otherwise discover. In its simplest terms, a XML Sitemap usually called
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* a Sitemap, with a capital S—is a list of the pages on your website.
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*
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* Creating and submitting a Sitemap helps make sure that Google knows about
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* all the pages on your site, including URLs that may not be discoverable by
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* Google's normal crawling process.
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*
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* The GoogleSitemap handle requests to 'sitemap.xml'
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* the other two classes are used to render the sitemap.
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*
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* You can notify ("ping") Google about a changed sitemap
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* automatically whenever a new page is published or unpublished.
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* By default, Google is not notified, and will pick up your new
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* sitemap whenever the GoogleBot visits your website.
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*
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* To Enable notification of Google after every publish set google_notification_enabled
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* to true in the googlesitemaps.yml config file.
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* This file is usually located in the _config folder of your project folder.
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* e.g mysite/_config/googlesitemaps.yml
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*
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* <example>
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* ---
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* Name: customgooglesitemaps
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* After: googlesitemaps
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* ---
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* GoogleSitemap:
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* enabled: true
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* objects_per_sitemap: 1000
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* google_notification_enabled: true
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* use_show_in_search: true
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* </example>
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*
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* @see http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=34609
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*
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* @package googlesitemaps
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*/
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class GoogleSitemap extends Object
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{
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/**
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* List of {@link DataObject} class names to include. As well as the change
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* frequency and priority of each class.
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*
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* @var array
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*/
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private static $dataobjects = array();
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/**
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* List of custom routes to include in the sitemap (such as controller
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* subclasses) as well as the change frequency and priority.
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*
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* @var array
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*/
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private static $routes = array();
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/**
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* Decorates the given DataObject with {@link GoogleSitemapDecorator}
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* and pushes the class name to the registered DataObjects.
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* Note that all registered DataObjects need the method AbsoluteLink().
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*
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* @param string $className name of DataObject to register
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* @param string $changeFreq how often is this DataObject updated?
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* Possible values:
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* always, hourly, daily, weekly, monthly, yearly, never
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* @param string $priority How important is this DataObject in comparison to other urls?
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* Possible values: 0.1, 0.2 ... , 0.9, 1.0
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*
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* @return void
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*/
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public static function register_dataobject($className, $changeFreq = 'monthly', $priority = '0.6')
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{
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if (!self::is_registered($className)) {
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$className::add_extension('GoogleSitemapExtension');
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self::$dataobjects[$className] = array(
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'frequency' => ($changeFreq) ? $changeFreq : 'monthly',
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'priority' => ($priority) ? $priority : '0.6'
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);
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}
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}
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/**
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* Registers multiple dataobjects in a single line. See {@link register_dataobject}
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* for the heavy lifting
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*
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* @param array $dataobjects array of class names of DataObject to register
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* @param string $changeFreq how often is this DataObject updated?
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* Possible values:
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* always, hourly, daily, weekly, monthly, yearly, never
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* @param string $priority How important is this DataObject in comparison to other urls?
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* Possible values: 0.1, 0.2 ... , 0.9, 1.0
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*
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* @return void
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*/
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public static function register_dataobjects($dataobjects, $changeFreq = 'monthly', $priority = '0.6')
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{
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foreach ($dataobjects as $obj) {
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self::register_dataobject($obj, $changeFreq, $priority);
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}
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}
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/**
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* Checks whether the given class name is already registered or not.
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*
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* @param string $className Name of DataObject to check
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*
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* @return bool
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*/
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public static function is_registered($className)
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{
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return isset(self::$dataobjects[$className]);
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}
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/**
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* Unregisters a class from the sitemap. Mostly used for the test suite
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*
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* @param string
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*/
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public static function unregister_dataobject($className)
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{
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unset(self::$dataobjects[$className]);
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}
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/**
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* Clears registered {@link DataObjects}. Useful for unit tests.
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*
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* @return void
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*/
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public static function clear_registered_dataobjects()
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{
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self::$dataobjects = array();
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}
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/**
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* Register a given route to the sitemap list
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*
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* @param string
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* @param string
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* @param string
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*
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* @return void
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*/
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public static function register_route($route, $changeFreq = 'monthly', $priority = '0.6')
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{
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self::$routes = array_merge(self::$routes, array(
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$route => array(
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'frequency' => ($changeFreq) ? $changeFreq : 'monthly',
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'priority' => ($priority) ? $priority : '0.6'
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)
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));
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}
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/**
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* Registers a given list of relative urls. Will be merged with the current
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* registered routes. If you want to replace them, please call {@link clear_routes}
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*
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* @param array
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* @param string
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* @param string
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*
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* @return void
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*/
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public static function register_routes($routes, $changeFreq = 'monthly', $priority = '0.6')
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{
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foreach ($routes as $route) {
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self::register_route($route, $changeFreq, $priority);
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}
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}
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/**
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* Clears registered routes
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*
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* @return void
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*/
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public static function clear_registered_routes()
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{
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self::$routes = array();
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}
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/**
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* Constructs the list of data to include in the rendered sitemap. Links
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* can include pages from the website, dataobjects (such as forum posts)
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* as well as custom registered paths.
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*
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* @param string
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* @param int
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*
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* @return ArrayList
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*/
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public function getItems($class, $page = 1)
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{
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//normalise the class name
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try {
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$reflectionClass = new ReflectionClass($class);
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$class = $reflectionClass->getName();
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} catch (ReflectionException $e) {
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// this can happen when $class is GoogleSitemapRoute
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//we should try to carry on
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}
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$output = new ArrayList();
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$count = Config::inst()->get('GoogleSitemap', 'objects_per_sitemap');
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$filter = Config::inst()->get('GoogleSitemap', 'use_show_in_search');
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// todo migrate to extension hook or DI point for other modules to
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// modify state filters
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if (class_exists('Translatable')) {
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Translatable::disable_locale_filter();
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}
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if ($class == "SiteTree") {
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$filter = ($filter) ? "\"ShowInSearch\" = 1" : "";
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$instances = Versioned::get_by_stage('SiteTree', 'Live', $filter);
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} elseif ($class == "GoogleSitemapRoute") {
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$instances = array_slice(self::$routes, ($page - 1) * $count, $count);
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$output = new ArrayList();
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if ($instances) {
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foreach ($instances as $route => $config) {
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$output->push(new ArrayData(array(
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'AbsoluteLink' => Director::absoluteURL($route),
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'ChangeFrequency' => $config['frequency'],
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'GooglePriority' => $config['priority']
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)));
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}
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}
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return $output;
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} else {
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$instances = new DataList($class);
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}
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$this->extend("alterDataList", $instances, $class);
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$instances = $instances->limit(
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$count,
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($page - 1) * $count
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);
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if ($instances) {
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foreach ($instances as $obj) {
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if ($obj->canIncludeInGoogleSitemap()) {
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$output->push($obj);
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}
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}
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}
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return $output;
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}
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/**
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* Static interface to instance level ->getItems() for backward compatibility.
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*
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* @param string
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* @param int
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*
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* @return ArrayList
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* @deprecated Please create an instance and call ->getSitemaps() instead.
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*/
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public static function get_items($class, $page = 1)
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{
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return static::inst()->getItems($class, $page);
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}
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/**
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* Returns the string frequency of edits for a particular dataobject class.
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*
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* Frequency for {@link SiteTree} objects can be determined from the version
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* history.
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*
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* @param string
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*
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* @return string
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*/
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public static function get_frequency_for_class($class)
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{
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foreach (self::$dataobjects as $type => $config) {
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if ($class == $type) {
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return $config['frequency'];
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}
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}
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return '';
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}
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/**
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* Returns the default priority of edits for a particular dataobject class.
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*
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* @param string
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*
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* @return float
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*/
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public static function get_priority_for_class($class)
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{
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foreach (self::$dataobjects as $type => $config) {
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if ($class == $type) {
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return $config['priority'];
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}
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}
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return 0.5;
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}
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/**
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* The google site map is broken down into multiple smaller files to
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* prevent overbearing a server. By default separate {@link DataObject}
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* records are keep in separate files and broken down into chunks.
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*
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* @return ArrayList
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*/
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public function getSitemaps()
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{
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$countPerFile = Config::inst()->get('GoogleSitemap', 'objects_per_sitemap');
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$sitemaps = new ArrayList();
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$filter = Config::inst()->get('GoogleSitemap', 'use_show_in_search');
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if (class_exists('SiteTree')) {
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// move to extension hook. At the moment moduleexists config hook
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// does not work.
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if (class_exists('Translatable')) {
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Translatable::disable_locale_filter();
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}
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$filter = ($filter) ? "\"ShowInSearch\" = 1" : "";
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$class = 'SiteTree';
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$instances = Versioned::get_by_stage($class, 'Live', $filter);
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$this->extend("alterDataList", $instances, $class);
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$count = $instances->count();
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$neededForPage = ceil($count / $countPerFile);
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for ($i = 1; $i <= $neededForPage; $i++) {
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$lastEdited = $instances
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->limit($countPerFile, ($i - 1) * $countPerFile)
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->sort(array())
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->max('LastEdited');
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$lastModified = ($lastEdited) ? date('Y-m-d', strtotime($lastEdited)) : date('Y-m-d');
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$sitemaps->push(new ArrayData(array(
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'ClassName' => 'SiteTree',
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'LastModified' => $lastModified,
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'Page' => $i
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)));
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}
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}
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if (count(self::$dataobjects) > 0) {
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foreach (self::$dataobjects as $class => $config) {
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$list = new DataList($class);
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$list = $list->sort('LastEdited ASC');
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$this->extend("alterDataList", $list, $class);
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$neededForClass = ceil($list->count() / $countPerFile);
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for ($i = 1; $i <= $neededForClass; $i++) {
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// determine the last modified date for this slice
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$sliced = $list
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->limit($countPerFile, ($i - 1) * $countPerFile)
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->last();
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$lastModified = ($sliced) ? $sliced->dbObject('LastEdited')->Format('Y-m-d') : date('Y-m-d');
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$sitemaps->push(new ArrayData(array(
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'ClassName' => $class,
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'Page' => $i,
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'LastModified' => $lastModified
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)));
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}
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}
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}
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if (count(self::$routes) > 0) {
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$needed = ceil(count(self::$routes) / $countPerFile);
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for ($i = 1; $i <= $needed; $i++) {
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$sitemaps->push(new ArrayData(array(
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'ClassName' => 'GoogleSitemapRoute',
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'Page' => $i
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)));
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}
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}
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return $sitemaps;
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}
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/**
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* Static interface to instance level ->getSitemaps() for backward compatibility.
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*
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* @return ArrayList
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* @deprecated Please create an instance and call ->getSitemaps() instead.
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*/
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public static function get_sitemaps()
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{
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return static::inst()->getSitemaps();
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}
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/**
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* Notifies Google about changes to your sitemap. This behavior is disabled
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* by default, to enable, read the documentation provided in the docs folder.
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*
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* After notifications have been enabled, every publish / unpublish of a page.
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* will notify Google of the update.
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*
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* If the site is in development mode no ping will be sent regardless whether
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* the Google notification is enabled.
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*
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* @return string Response text
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*/
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public static function ping()
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{
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if (!self::enabled()) {
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return false;
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}
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// Don't ping if the site has disabled it, or if the site is in dev mode
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$active = Config::inst()->get('GoogleSitemap', 'google_notification_enabled');
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if (!$active || Director::isDev()) {
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return;
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}
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$location = urlencode(Controller::join_links(
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Director::absoluteBaseURL(),
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'sitemap.xml'
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));
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$response = self::send_ping(
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"www.google.com", "/webmasters/sitemaps/ping", sprintf("sitemap=%s", $location)
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);
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return $response;
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}
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/**
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* Send an HTTP request to the host.
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*
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* @return String Response text
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*/
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protected static function send_ping($host, $path, $query)
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{
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$socket = fsockopen($host, 80, $errno, $error);
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if (!$socket) {
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return $error;
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}
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if ($query) {
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$query = '?' . $query;
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}
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$request = "GET {$path}{$query} HTTP/1.1\r\nHost: $host\r\nConnection: Close\r\n\r\n";
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fwrite($socket, $request);
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$response = stream_get_contents($socket);
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return $response;
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}
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/**
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* Is GoogleSitemap enabled?
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*
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* @return boolean
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*/
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public static function enabled()
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{
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return (Config::inst()->get('GoogleSitemap', 'enabled', Config::INHERITED));
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}
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/**
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* Convenience method for manufacturing an instance for hew instance-level methods (and for easier type definition).
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*
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* @return GoogleSitemap
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*/
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public static function inst()
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{
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return GoogleSitemap::create();
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}
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}
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